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复杂矿石中微量鎘的极譜測定,一般手續較繁,結果不很理想,我們为了使測定方法更为完善,經过试验,采用了如下分析步驟: 称取磨細了的試样0.5克(或1克),放入100毫升烧杯中,以水潤湿,加入約10毫升盐酸(比重1.19),煑沸5～10分钟,赶去硫化氢,加入5毫升硝酸蒸干,再加5毫升盐酸蒸干。用少量稀盐酸(1:1)溶解,全部移入50毫升容量瓶中,用少量水洗滌2～3次。用稀氨水(1:1)慢慢中和至开始沉淀氢氧化鉄为止(如果在个別試样中沒有鉄,要加入20～
The determination of trace amounts of cadmium in the complex ores, the general procedures for more complicated, the result is not very satisfactory, in order to make the determination method is more perfect, after testing, using the following analysis steps: Weigh the ground sample 0.5 g ( Or 1 g) into a 100 ml beaker, moistened with water, add about 10 ml of hydrochloric acid (specific gravity 1.19), boil for 5 to 10 minutes, rush to hydrogen sulfide, add 5 ml of nitric acid to dry, add 5 ml Hydrochloric acid evaporated. Dissolved with a small amount of dilute hydrochloric acid (1: 1), all moved into a 50 ml volumetric flask, washed with a small amount of water 2 to 3 times. With dilute ammonia (1: 1) and slowly neutralized until the start precipitated hydroxide 鉄 so far (if there is no 个 in individual samples, to join 20 ~